Correct, it didn’t crash to desktop, but it did render the simulator unresponsive and unrecoverable.
Sorry, I understood the sim was unresponsive for a brief moment until you terminated Couatl, but then recovered. That was strange, and that's why I initially said it would be worth investigating, now I fully understood what really happen, then no, what you saw wasn't Couatl making the sim unresponsive, it was the sim that crashed for all the reasons that has been discussed in this thread, that seem to have found an agreement the sim IS unstable these days because of server issues over Microsoft.
Because of this, Couatl crashed, the same made it crash, not vice-versa.
The common pattern that seems to emerge is, it's a problem of the MSFS servers, because it seems that almost everybody who had continues CTDs these days, fixed them immediately by switching off the online services in MSFS. And keeping GSX, of course.